Guys need to know that it takes more than just to join to get laid using AFF. Men outnumber women on every hook up site so what you need to do is to stand out from the crowd! Create a nice profile and upload some nice pictures. Don't ever send d#$ pictures. Never ever! Be patient and be creative.
It is also very advisible to use more than just one hook up site. CasualDating4u.com is an absolutely amazing site which will give you access to many female profiles. You may wanna use more than just one site to maximize your chances.
Whatever you do, don't expect to hookup within a week or so. It takes more time. You may be lucky and hook up faster but from my experience it takes a few weeks before you will have your first date.